The catalytic, corrosion and sintering properties of Pt/C and Pt 3Ni1/C catalysts are evaluated using an accelerated durability test (ADT). The catalytic activity and dissolution rate of Ni from a Pt3Ni1/C alloy catalyst are estimated in the same time domain. A strong correlation exists between the amount of Ni dissolved and the oxygen reduction activity of the catalyst. To compare the sintering resistance of both the Pt/C and Pt3Ni1/C catalyst, the particle size of the catalysts before and after the ADT is measured by using transmission electron microscopy. The Pt3Ni1/C alloy, due to anchor effects in its structure, shows high sintering resistance.
|Number of pages||5|
|Publication status||Published - 2004 Aug|
Bibliographical noteFunding Information:
Acknowledgements. We thank Ms. Ulla Kiiski and Ms. Asja Mile-tic for skillful technical assistance and Ms. Marja-Leena Rissanen for skilled secretarial help. M.S.-B. was a recipient of a short-term fellowship from the Programme on Developmental Biology of the European Science Foundation. This work was supported by the Medical Research Council of the Academy of Finland, the Uni-
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